source4/libcli/raw/clisocket.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB client socket context management functions
   5
   6    Copyright (C) Andrew Tridgell 1994-2005
   7    Copyright (C) James Myers 2003 <myersjj@samba.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "lib/events/events.h"
  25 #include "libcli/raw/libcliraw.h"
  26 #include "libcli/composite/composite.h"
  27 #include "lib/socket/socket.h"
  28 #include "libcli/resolve/resolve.h"
  29 #include "param/param.h"
  30
  31 struct sock_connect_state {
  32         struct composite_context *ctx;
  33         const char *host_name;
  34         int num_ports;
  35         uint16_t *ports;
  36         struct smbcli_socket *result;
  37 };
  38
  39 /*
  40   connect a smbcli_socket context to an IP/port pair
  41   if port is 0 then choose 445 then 139
  42 */
  43
  44 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
  45
  46 struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
  47                                                    const char *host_addr,
  48                                                    int port,
  49                                                    const char *host_name,
  50                                                    struct event_context *event_ctx)
  51 {
  52         struct composite_context *result, *ctx;
  53         struct sock_connect_state *state;
  54
  55         result = talloc_zero(mem_ctx, struct composite_context);
  56         if (result == NULL) goto failed;
  57         result->state = COMPOSITE_STATE_IN_PROGRESS;
  58
  59         if (event_ctx != NULL) {
  60                 result->event_ctx = talloc_reference(result, event_ctx);
  61         } else {
  62                 result->event_ctx = event_context_init(result);
  63         }
  64
  65         if (result->event_ctx == NULL) goto failed;
  66
  67         state = talloc(result, struct sock_connect_state);
  68         if (state == NULL) goto failed;
  69         state->ctx = result;
  70         result->private_data = state;
  71
  72         state->host_name = talloc_strdup(state, host_name);
  73         if (state->host_name == NULL) goto failed;
  74
  75         if (port == 0) {
  76                 const char **ports = lp_smb_ports(global_loadparm);
  77                 int i;
  78
  79                 for (i=0;ports[i];i++) /* noop */ ;
  80                 if (i == 0) {
  81                         DEBUG(3, ("no smb ports defined\n"));
  82                         goto failed;
  83                 }
  84                 state->num_ports = i;
  85                 state->ports = talloc_array(state, uint16_t, i);
  86                 if (state->ports == NULL) goto failed;
  87                 for (i=0;ports[i];i++) {
  88                         state->ports[i] = atoi(ports[i]);
  89                 }
  90         } else {
  91                 state->ports = talloc_array(state, uint16_t, 1);
  92                 if (state->ports == NULL) goto failed;
  93                 state->num_ports = 1;
  94                 state->ports[0] = port;
  95         }
  96
  97         ctx = socket_connect_multi_send(state, host_addr,
  98                                         state->num_ports, state->ports,
  99                                         state->ctx->event_ctx);
 100         if (ctx == NULL) goto failed;
 101         ctx->async.fn = smbcli_sock_connect_recv_conn;
 102         ctx->async.private_data = state;
 103         return result;
 104
 105 failed:
 106         talloc_free(result);
 107         return NULL;
 108 }
 109
 110 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
 111 {
 112         struct sock_connect_state *state =
 113                 talloc_get_type(ctx->async.private_data,
 114                                 struct sock_connect_state);
 115         struct socket_context *sock;
 116         uint16_t port;
 117
 118         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
 119                                                        &port);
 120         if (!composite_is_ok(state->ctx)) return;
 121
 122         state->ctx->status =
 123                 socket_set_option(sock, lp_socket_options(global_loadparm), NULL);
 124         if (!composite_is_ok(state->ctx)) return;
 125
 126
 127         state->result = talloc_zero(state, struct smbcli_socket);
 128         if (composite_nomem(state->result, state->ctx)) return;
 129
 130         state->result->sock = talloc_steal(state->result, sock);
 131         state->result->port = port;
 132         state->result->hostname = talloc_steal(sock, state->host_name);
 133
 134         state->result->event.ctx =
 135                 talloc_reference(state->result, state->ctx->event_ctx);
 136         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
 137
 138         composite_done(state->ctx);
 139 }
 140
 141 /*
 142   finish a smbcli_sock_connect_send() operation
 143 */
 144 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
 145                                   TALLOC_CTX *mem_ctx,
 146                                   struct smbcli_socket **result)
 147 {
 148         NTSTATUS status = composite_wait(c);
 149         if (NT_STATUS_IS_OK(status)) {
 150                 struct sock_connect_state *state =
 151                         talloc_get_type(c->private_data,
 152                                         struct sock_connect_state);
 153                 *result = talloc_steal(mem_ctx, state->result);
 154         }
 155         talloc_free(c);
 156         return status;
 157 }
 158
 159 /*
 160   connect a smbcli_socket context to an IP/port pair
 161   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
 162
 163   sync version of the function
 164 */
 165 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
 166                              const char *host_addr, int port,
 167                              const char *host_name,
 168                              struct event_context *event_ctx,
 169                              struct smbcli_socket **result)
 170 {
 171         struct composite_context *c =
 172                 smbcli_sock_connect_send(mem_ctx, host_addr, port, host_name,
 173                                          event_ctx);
 174         return smbcli_sock_connect_recv(c, mem_ctx, result);
 175 }
 176
 177
 178 /****************************************************************************
 179  mark the socket as dead
 180 ****************************************************************************/
 181 void smbcli_sock_dead(struct smbcli_socket *sock)
 182 {
 183         talloc_free(sock->event.fde);
 184         sock->event.fde = NULL;
 185         talloc_free(sock->sock);
 186         sock->sock = NULL;
 187 }
 188
 189 /****************************************************************************
 190  Set socket options on a open connection.
 191 ****************************************************************************/
 192 void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
 193 {
 194         socket_set_option(sock->sock, options, NULL);
 195 }
 196
 197 /****************************************************************************
 198 resolve a hostname and connect
 199 ****************************************************************************/
 200 struct smbcli_socket *smbcli_sock_connect_byname(const char *host, int port,
 201                                                  TALLOC_CTX *mem_ctx,
 202                                                  struct event_context *event_ctx)
 203 {
 204         int name_type = NBT_NAME_SERVER;
 205         const char *address;
 206         NTSTATUS status;
 207         struct nbt_name nbt_name;
 208         char *name, *p;
 209         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 210         struct smbcli_socket *result;
 211
 212         if (tmp_ctx == NULL) {
 213                 DEBUG(0, ("talloc_new failed\n"));
 214                 return NULL;
 215         }
 216
 217         name = talloc_strdup(tmp_ctx, host);
 218         if (name == NULL) {
 219                 DEBUG(0, ("talloc_strdup failed\n"));
 220                 talloc_free(tmp_ctx);
 221                 return NULL;
 222         }
 223
 224         if (event_ctx == NULL) {
 225                 event_ctx = event_context_init(mem_ctx);
 226         }
 227
 228         if (event_ctx == NULL) {
 229                 DEBUG(0, ("event_context_init failed\n"));
 230                 talloc_free(tmp_ctx);
 231                 return NULL;
 232         }
 233
 234         /* allow hostnames of the form NAME#xx and do a netbios lookup */
 235         if ((p = strchr(name, '#'))) {
 236                 name_type = strtol(p+1, NULL, 16);
 237                 *p = 0;
 238         }
 239
 240         make_nbt_name(&nbt_name, host, name_type);
 241
 242         status = resolve_name(&nbt_name, tmp_ctx, &address, event_ctx);
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 talloc_free(tmp_ctx);
 245                 return NULL;
 246         }
 247
 248         status = smbcli_sock_connect(mem_ctx, address, port, name, event_ctx,
 249                                      &result);
 250
 251         if (!NT_STATUS_IS_OK(status)) {
 252                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
 253                           nt_errstr(status)));
 254                 talloc_free(tmp_ctx);
 255                 return NULL;
 256         }
 257
 258         talloc_free(tmp_ctx);
 259
 260         return result;
 261 }